 |
| English thesaurus | |||
| |||
| pH | |||
| hydrogen: 110 phrases in 15 subjects |
| Agriculture | 1 |
| Astronautics | 13 |
| Aviation | 7 |
| Chemistry | 22 |
| Diplomacy | 1 |
| Ecology | 1 |
| Environment | 1 |
| General | 7 |
| Metallurgy | 8 |
| Microelectronics | 8 |
| Military | 17 |
| Natural sciences | 1 |
| Oil and gas | 19 |
| Space | 1 |
| Technology | 3 |